CN104561425B - A kind of gas base method microwave heating continuous industry produces reduced iron powder device and using method thereof - Google Patents
A kind of gas base method microwave heating continuous industry produces reduced iron powder device and using method thereof Download PDFInfo
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- CN104561425B CN104561425B CN201510072960.3A CN201510072960A CN104561425B CN 104561425 B CN104561425 B CN 104561425B CN 201510072960 A CN201510072960 A CN 201510072960A CN 104561425 B CN104561425 B CN 104561425B
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Abstract
A kind of gas base method microwave heating continuous industry produces reduced iron powder device and using method thereof, be heated to powdered iron ore and coal gas inverse motion in gas base microwave heating reactor of reduction temperature respectively, reduction reaction is there is fast under microwave exposure, microwave heating powdered iron ore device, gas base microwave heating reactor all adopt microwave heating, and the present invention can realize reducing reduction temperature, reduces the reduction reaction time, reduces energy consumption, enhances productivity, improve resultant metal rate.
Description
Technical field
The invention belongs to a kind of gas base method microwave heating continuous industry and produce reduced iron powder technical field.
Background technology
Direct-reduced iron technology be with gas or solid reductant lower than under ore softening temperature, reduction of iron ore is become the method for metallic iron in reaction unit.Direct-reduction iron processes is divided into two large classes: by the gas base method of coal gas as reductive agent and thermophore; Coal-based method using solid coal as reductive agent.Existing gas base method basic technology is: high-temperature reducing gas in shaft furnace with chill lump ore or pellet inverse motion, iron oxide reduction, while heating iron ore deposit or pellet, is fe by high-temperature reducing gas.The basic technology of existing coal-based method is: with solid coal dust for reductive agent, and under outside hot conditions, by heat trnasfer reacting by heating material to reduction temperature, the powdered iron ore of uniform surrounding or pellet ore reduction are fe by coal dust.These two kinds of methods have the following disadvantages:
1) produce Raw in gas base method must use and possess the lump ore of suitable intensity, fine ore must ball processed, be sintered to pellet.
2) in gas base method is produced due to reductive agent or the main heating source of reduction reaction, the high temperature reduction agent that must feed high shrink range maintains reduction reaction temperature and compensates chemical reaction heat, containing a large amount of H in the waste gas after reduction reaction
2and CO.
3) in gas base method is produced due to reductive agent and iron ore or pellet contact gear ratio surface-area little, reduction reaction from outward appearance to inner essence occurs, long reaction time.
4) in gas base method is produced, the heating of high temperature reduction agent to iron ore or pellet carries out heat trnasfer mainly through thermal conduction, and from outward appearance to inner essence, heat-up time is long, causes reduction reaction efficiency not high, long reaction time in heating.
5) gas base method produce in for guaranteeing that reductive agent has good mobility in shaft furnace, reductive agent must ensure certain pressure feed shaft furnace, equipment at high temperature pressure operation adds manufacturing cost.
6) the coal-based method production time is very long, and reduction reaction temperature is higher.
7) coal-based method requirement is good as the coal dust reactive behavior of reductive agent, ash oontent is low, ash content fusing point is high, sulphur content is low, higher to the requirement of coal dust.
8) coal-based method thermo-efficiency is low, production efficiency is low, production cost is higher, seriously polluted.
For deficiency or the defect of above two kinds of production methods, have now enterprise and scientific research institution to propose many new breakthroughs to direct-reduction process for making iron, what have enters pilot scale degree.Mainly provide reduction reaction thermal source with new type of heating, the most outstanding provides reduction reaction heat energy with micro-wave energy exactly.More representational have the coal-based shaft furnace of microwave heating; The coal-based continuous tunnel furnace of microwave heating.
The typical process flow of the coal-based shaft furnace of microwave heating is: use lump ore or pellet, coal dust is allocated into by certain iron carbon ratio, the mixing raw material prepared relies on self gravitation to act in shaft furnace and moves down, the outer wall surrounding of shaft furnace is staggered installation of microwave source and bursts into Microwave Heating coal dust, iron ore to reduction temperature in stove, keep the sufficient reaction times by the control of charging and discharging, produce the product of certain degree of metalization.
The typical process flow of the coal-based continuous tunnel furnace of microwave heating is: mainly use fine iron ore, by certain iron carbon ratio, powdered iron ore and coal dust being joined even loading as reaction mass can through in the container of microwave, many the containers that reaction mass is housed are pushed through continuous tunnel furnace by push rod successively, the microwave source that continuous tunnel furnace outer wall arranges is burst into micro-wave energy in stove, heating coal dust, powdered iron ore are to reduction temperature, ensureing the sufficient reaction times by controlling push rod pusher interval, producing the product of certain degree of metalization.These methods also have many deficiencies:
1) because microwave heating efficiency, temperature rise rate are directly related with the granularity of heated material, more tiny particulate absorbent microwave efficiency is higher, temperature rise rate is faster, the coal-based shaft furnace of microwave heating for raw material, makes microwave heating efficiency be restricted with lump ore or pellet.
2) the coal-based continuous tunnel furnace of microwave heating is with powdered iron ore and coal blending thing for raw material, and obtained product must broken, magnetic separation, will also need further processing, even secondary reduction by production high-quality reduced iron powder.
3) above method is all that along with deepening continuously of reduction process, oxidized iron metal rate improves constantly absorbing property and declines, and even becomes microwave reflection, heats up further very difficult in the following heating edge reduction of microwave environment.
4) improve to overcome oxidized iron metal rate the further intensification difficulty brought, only in reaction mass, polygamy adds coal dust, and the coal dust reacted in waste is difficult to recycle.
5) above method participates in the reductive agent of reaction, iron oxide ore is all that cold burden drops into.Reduction reaction is thermo-negative reaction, the sensible heat of reaction mass, chemical reaction heat all need to expend huge heat energy, for manufacture, the selling price situation of present high power magnetron, in a reactor, provide reaction mass sensible heat, chemical reaction heat heat energy consumption by micro-wave energy, also will take into account production efficiency, economic target has very large limitation.
Summary of the invention
In order to overcome the limitation of the above each side with not enough, the invention provides a kind of gas base method microwave heating continuous industry and produce reduced iron powder device and method, this device and method can effectively improve energy utilization rate, enhances productivity, reduces production unit manufacturing cost, reduces products production cost, improve the quality of products.
Object of the present invention is achieved through the following technical solutions.
A kind of gas base method microwave heating continuous industry produces reduced iron powder device, the present invention is characterised in that, this device comprises gas base microwave heating reactor, and offer hot iron breeze opening for feed in the side, top of gas base microwave heating reactor, opposite side offers and reaction end gas relief outlet; The outer side wall of gas base microwave heating reactor interlocks and is provided with reaction microwave source; Gas base microwave heating reactor lower part is set to funnelform cold cut section; In the inside of gas base microwave heating reactor, there is the inner chamber division plate being no less than one-level staggered linking up and down, inner chamber division plate is connected to form by domatic and inner chamber division plate Caused by Sloping Surfaces two face of slope on inner chamber division plate, and two horizontal edges of inner chamber division plate and top margin setting-in enter in the preformed groove on lagging material that gas base microwave heating reactor internal chamber wall lays; The domatic below being located at the hot iron breeze opening for feed of gas base microwave heating reactor on the inner chamber division plate of first step inner chamber division plate, the inner chamber division plate Caused by Sloping Surfaces lower end of first step inner chamber division plate and the inner chamber division plate of second stage inner chamber division plate are provided with powdered iron ore blanking port between domatic upper end, circulate successively, between the lower end of the inner chamber division plate Caused by Sloping Surfaces of N level inner chamber division plate and the sidewall on cold cut section top, be equipped with powdered iron ore blanking port; The sidewall of gas base microwave heating reactor corresponding to every one-level inner chamber division plate upper surface offers reductive agent and passes into mouth; Wherein, on inner chamber division plate the domatic gradient close to and be not less than powdered iron ore self-flowing angle, the inner chamber division plate Caused by Sloping Surfaces gradient close to and be not more than powdered iron ore self-flowing angle; Pass on mouth at the reductive agent of every one-level and be all connected with heating gas pipeline, the heating gas provided by heated by gas device is sent into above the inner chamber division plates at different levels in gas base microwave heating reactor respectively.
The present invention all to stagger the opening of reaction microwave source of subtend at interlock reaction microwave source that opening arranges of gas base microwave heating reactor outer side wall, and microwave power adopts adjustable;
The outer side wall of gas base microwave heating reactor stagger reaction microwave source opening position separately staggered opening pass into mouth as reductive agent; The present invention is at the joining place of upper and lower two-stage inner chamber division plate, and inner chamber division plate Caused by Sloping Surfaces tail end and gas base microwave heating reactor internal chamber wall lagging material are provided with a long strip shape opening as hot iron breeze blanking port.
Step that the present invention gets is:
The hot iron breeze being heated to temperature > 800 DEG C enters gas base microwave heating reactor by the hot iron breeze opening for feed of gas base microwave heating reactor top, the hot iron breeze entering gas base microwave heating reactor falls on the inner chamber division plate of gas base microwave heating reactor, because the gradient domatic on inner chamber division plate is not less than hot iron breeze self-flowing angle, under gravity, hot iron breeze goes up a slope along inner chamber division plate and to face down movement, the inner chamber division plate Caused by Sloping Surfaces gradient close to and be not more than hot iron breeze self-flowing angle, the hot iron breeze resting on inner chamber division plate Caused by Sloping Surfaces is in from flowing criticality at any time when the hot iron breeze pressure being subject to domatic movement on inner chamber division plate just moves down, just stop or slowing down to gas base microwave heating reactor feeding hot iron breeze when needs extend the reduction reaction time, fall to next block inner chamber division plate through overheated powdered iron ore blanking port after hot iron breeze moves through domatic on inner chamber division plate, inner chamber division plate Caused by Sloping Surfaces and continue to move down, similar hot iron breeze moves through whole inner chamber division plate, the water-gas being heated to temperature > 600 DEG C passes into mouth by reductive agent and enters gas base microwave heating reactor, the reaction microwave source that gas base microwave heating reactor outer wall arranges is burst into micro-wave energy to gas base microwave heating reactor, Microwave Heating hot iron breeze also reduces reduction reaction reaction activity, water-gas and hot iron breeze generation reduction reaction, reactive chemistry equation is:
Fe
2O
3+3H
2＝2Fe+3H
2O
Fe
2O
3+3CO＝2Fe+3CO
2
Hot iron breeze is turned into thermal reduction iron powder through reduction reaction, and because reduction reaction completes at relatively low temperature, thermal reduction iron powder keeps powder to possess mobility mutually and continue to move down entering gas base microwave heating reactor hypomere and cool; The reaction end gas that gas base microwave heating reactor produces rises and discharges from reaction end gas relief outlet.
By the processing step that vibrational power flow of the present invention and the present invention use this device to take, the present invention is made to be provided with following technical characterstic:
1) powdered iron ore heated respectively and water-gas inverse motion in gas base microwave heating reactor, carries out reduction reaction under microwave exposure in gas base microwave heating reactor;
2) reductive agent is gaseous state, hot iron breeze is that powder increases reducing agents contact area mutually, reduction reaction provides chemical reaction heat with micro-wave energy and reduces reaction activity, reduce reduction reaction temperature, the reduced iron powder that hot iron breeze and reaction are produced all keeps powder phase and keeps powder fluidity;
3) movement of thermal reduction iron powder in gas base microwave heating reactor that hot iron breeze and reaction are produced all relies on gravity suffered by himself.
Principle of work of the present invention is, the powdered iron ore heated respectively and hot water coal gas inverse motion in gas base microwave heating reactor, carries out reduction reaction under microwave exposure in gas base microwave heating reactor; Reductive agent is gaseous state, hot iron breeze is that powder increases reducing agents contact area mutually, and reduction reaction reduces reaction activity with micro-wave energy, and reduce reduction reaction temperature, the reduced iron powder that hot iron breeze and reaction are produced all keeps powder phase and keeps powder fluidity; The movement of reduced iron powder in gas base microwave heating reactor that hot iron breeze and reaction are produced all relies on gravity suffered by himself; Described gas base microwave heating reactor is the airtight bucket body structure of column, at right angle setting, by energy microwave reflection, high temperature material manufacture, preferred high temperature resistant stainless steel, gas base microwave heating reactor cross-section size, height dimension meet the transmission condition of the corresponding microwave of adopted frequency, the preferred rectangle of shape of cross section; The perforate of gas base microwave heating reactor top is as hot iron breeze opening for feed; Gas base microwave heating reactor top separately perforate as reaction end gas relief outlet.The wall of gas base microwave heating reactor inner chamber lays multilayer can through microwave, resistant to elevated temperatures lagging material, preferred high density aluminum oxide ceramic beaverboard, the inner chamber of gas base microwave heating reactor short transverse by some can through microwave, high temperature resistant, high strength, in falling, " people " font is staggered to be separated the inner chamber division plate of heat shock resistance, the preferred silicon nitride ceramic plate of inner chamber division plate, inner chamber division plate square section is in " ヘ " font, two horizontal edges and a straight flange setting-in of inner chamber division plate enter in gas base microwave heating reactor inner chamber lagging material preformed groove, inner chamber division plate tilts to install on formation inner chamber division plate domatic, inner chamber division plate Caused by Sloping Surfaces two face of slope, on inner chamber division plate the domatic gradient close to and be not less than powdered iron ore self-flowing angle, the inner chamber division plate Caused by Sloping Surfaces gradient close to and be not more than powdered iron ore self-flowing angle, the hot iron breeze resting on inner chamber division plate Caused by Sloping Surfaces is in from flowing criticality at any time when the hot iron breeze pressure being subject to domatic movement on inner chamber division plate just moves down, when domatic without hot iron breeze on inner chamber division plate, then distress resolves inner chamber division plate Caused by Sloping Surfaces hot iron breeze just keeps static, the outer edge of inner chamber division plate straight flange down and gas base microwave heating reactor internal chamber wall lagging material leave suitably distance and form a long strip shape opening as hot iron breeze blanking port, hot iron breeze moves through domatic on inner chamber division plate, inner chamber division plate Caused by Sloping Surfaces and falls to next block inner chamber division plate through powdered iron ore blanking port, and similar hot iron breeze moves through whole inner chamber division plate, the outer wall of gas base microwave heating reactor interlocks the opening subtend reaction microwave source opening that arranges reaction microwave source and each reaction microwave source all staggers, microwave power adopts adjustable, gas base microwave heating reactor outer side wall separately staggered opening pass into mouth as reductive agent, reductive agent leads to ingress and leads to entrance opening dimension incision gas base microwave heating reactor inner chamber lagging material according to reductive agent, reductive agent is made to lead to pass-through entry to gas base microwave heating reactor inner chamber, reductive agent leads to the cut-off transmission condition that entrance opening dimension meets the corresponding microwave of adopted frequency, reductive agent passes into mouth and heating gas pipeline communication.
The present invention mainly contains following advantage:
1, participate in the powdered iron ore of reduction reaction, coal gas is all heated to high temperature and enters gas base microwave heating reactor again and carry out reduction reaction, improve reduction reaction efficiency.
2, due to the effect of gas base microwave heating reactor inner chamber division plate, allow hot iron breeze be in controlled flow state in gas base microwave heating reactor, improve water-gas and hot iron breeze contact area, improve reduction efficiency.
3, due to the effect of gas base microwave heating reactor division plate, reduce the universal gravity constant effect that hot iron breeze falls, delay the dropping process of hot iron breeze in gas base microwave heating reactor, increase the reduction reaction time, make reduction reaction more abundant, improve resultant metal rate.
4, in gas base microwave heating reactor, the water-gas risen sluggish hot iron breeze falling velocity, increases the fall time of hot iron breeze in gas base microwave heating reactor, thus increases the reduction reaction time, make reduction reaction more abundant, improve resultant metal rate.
5, in gas base microwave heating reactor, burst and while reacting by heating material provides reduction reaction chemical reaction heat, reduce reaction activity into reaction micro-wave energy, make reduction reaction maintain relative low temperature degree all the time, the thermal reduction iron powder that hot iron breeze and reaction produce keeps powder mutually and maintains powder phase mobility all the time.
6, equipment has good versatility, and can be widely used in powder phase, gas-phase chemical reaction under microwave environment, such as, in reaction raw materials, hot iron breeze changes and makes Fe
3o
4, water-gas change make this device of warm air just can production red iron oxide.
Content of the present invention is set forth further below in conjunction with drawings and Examples.
Accompanying drawing explanation
Fig. 1 is schematic diagram of the present invention.
On 1-hot iron breeze 2-gas base microwave heating reactor 3-hot iron breeze opening for feed 4-inner chamber division plate 5-inner chamber division plate, domatic 6-inner chamber division plate Caused by Sloping Surfaces 7-hot iron breeze blanking port 8-reaction microwave source 9-reductive agent passes into a mouthful 10-heating gas pipeline 11-thermal reduction iron powder 12-reaction end gas relief outlet.
Embodiment
A kind of gas base method microwave heating continuous industry produces reduced iron powder device, the present invention is characterised in that, this device comprises gas base microwave heating reactor 2, offer hot iron breeze (1) opening for feed in the side, top of gas base microwave heating reactor 2, opposite side offers reaction end gas relief outlet (12); On the outer side wall of gas base microwave heating reactor 2, staggered being provided with reacts microwave source 8; Gas base microwave heating reactor 2 bottom is set to funnelform cold cut section; In the inside of gas base microwave heating reactor 2, there is the inner chamber division plate 4 being no less than one-level staggered linking up and down, inner chamber division plate 4 by inner chamber division plate domatic 5 and inner chamber division plate Caused by Sloping Surfaces 6 two face of slope connect to form, two horizontal edges of inner chamber division plate 4 and top margin setting-in enter in the preformed groove on lagging material that gas base microwave heating reactor internal chamber wall lays; Domatic 5 belows being located at hot iron breeze 1 opening for feed of gas base microwave heating reactor 2 on the inner chamber division plate of first step inner chamber division plate 4, the inner chamber division plate Caused by Sloping Surfaces lower end of first step inner chamber division plate and the inner chamber division plate of second stage inner chamber division plate are provided with powdered iron ore blanking port 7 between domatic upper end, circulate successively, between the lower end of the inner chamber division plate Caused by Sloping Surfaces of N level inner chamber division plate and the sidewall on cold cut section top, be equipped with powdered iron ore blanking port 7; The sidewall of gas base microwave heating reactor 2 corresponding to every one-level inner chamber division plate 4 upper surface offers reductive agent and passes into mouth 9; Wherein, on inner chamber division plate domatic 5 gradients close to and be not less than powdered iron ore self-flowing angle, inner chamber division plate Caused by Sloping Surfaces 6 gradient close to and be not more than powdered iron ore self-flowing angle; Pass on mouth 9 at the reductive agent of every one-level and be all connected with heating gas pipeline 10, the heating gas provided by heated by gas device is sent into above the inner chamber division plates 4 at different levels in gas base microwave heating reactor 2 respectively.
The present invention all to stagger the opening of reaction microwave source of subtend at interlock reaction microwave source 8 that opening arranges of gas base microwave heating reactor 2 outer side wall, and microwave power adopts adjustable;
The outer side wall of gas base microwave heating reactor 2 stagger reaction microwave source 8 opening position separately staggered opening pass into mouth 9 as reductive agent;
The present invention is at the joining place of upper and lower two-stage inner chamber division plate 4, and inner chamber division plate Caused by Sloping Surfaces 6 tail end and gas base microwave heating reactor 2 internal chamber wall lagging material are provided with a long strip shape opening as hot iron breeze blanking port.
Step that the present invention gets is:
The hot iron breeze being heated to temperature > 800 DEG C enters gas base microwave heating reactor by the hot iron breeze opening for feed of gas base microwave heating reactor top, the hot iron breeze entering gas base microwave heating reactor falls on the inner chamber division plate of gas base microwave heating reactor, because the gradient domatic on inner chamber division plate is not less than hot iron breeze self-flowing angle, under gravity, hot iron breeze goes up a slope along inner chamber division plate and to face down movement, the inner chamber division plate Caused by Sloping Surfaces gradient close to and be not more than hot iron breeze self-flowing angle, the hot iron breeze resting on inner chamber division plate Caused by Sloping Surfaces is in from flowing criticality at any time when the hot iron breeze pressure being subject to domatic movement on inner chamber division plate just moves down, just stop or slowing down to gas base microwave heating reactor feeding hot iron breeze when needs extend the reduction reaction time, fall to next block inner chamber division plate through overheated powdered iron ore blanking port after hot iron breeze moves through domatic on inner chamber division plate, inner chamber division plate Caused by Sloping Surfaces and continue to move down, similar hot iron breeze moves through whole inner chamber division plate, the water-gas being heated to temperature > 600 DEG C passes into mouth by reductive agent and enters gas base microwave heating reactor, the reaction microwave source that gas base microwave heating reactor outer wall arranges is burst into micro-wave energy to gas base microwave heating reactor, Microwave Heating hot iron breeze also reduces reduction reaction reaction activity, water-gas and hot iron breeze generation reduction reaction, reactive chemistry equation is:
Fe
2O
3+3H
2＝2Fe+3H
2O
Fe
2O
3+3CO＝2Fe+3CO
2
Hot iron breeze is turned into thermal reduction iron powder through reduction reaction, and because reduction reaction completes at relatively low temperature, thermal reduction iron powder keeps powder to possess mobility mutually and continue to move down entering gas base microwave heating reactor hypomere and cool; The reaction end gas that gas base microwave heating reactor produces rises and discharges from reaction end gas relief outlet.
Embodiment 1
See Fig. 1, the hot iron breeze 1 being heated to 820 DEG C enters gas base microwave heating reactor 2 by the hot iron breeze opening for feed 3 on gas base microwave heating reactor 2 top and falls on inner chamber division plate 4, because 5 gradients domatic on inner chamber division plate are not less than hot iron breeze 1 self-flowing angle, under gravity, hot iron breeze 1 is along inner chamber division plate domatic 5 flows downward; Inner chamber division plate Caused by Sloping Surfaces 6 gradient close to and be not more than hot iron breeze 1 self-flowing angle, the hot iron breeze 1 resting on inner chamber division plate Caused by Sloping Surfaces 6 is in from flowing criticality when hot iron breeze 1 pressure that be subject to domatic 5 movements on inner chamber division plate just flows downward at any time, and hot iron breeze 1 moves through hot iron breeze blanking port 7 and falls to next block inner chamber division plate and continue to move down and flow through whole inner chamber division plate; Heating gas pipeline 10 passes into by reductive agent mouth 9 to feed water-gas from temperature > 600 DEG C to gas base microwave heating reactor 2, hot iron breeze 1 in the process moved down with passed into mouth 9 by reductive agent and enter gas base microwave heating reactor 2 and the hot water coal gas generation reduction reaction constantly risen, reactive chemistry equation is:
Fe
2O
3+3H
2＝2Fe+3H
2O
Fe
2O
3+3CO＝2Fe+3CO
2
The reaction microwave source 8 that gas base microwave heating reactor 2 outer wall arranges heats total power and is adjusted to 16KW, reaction microwave source 8 is burst to gas base microwave heating reactor 2 and is provided chemical reaction heat into micro-wave energy and reduce reduction reaction reaction activity, and reduction reaction is realized fast; Hot iron breeze 1 becomes thermal reduction iron powder 11 through reduction reaction; Thermal reduction iron powder 11 temperature after the cooling of gas base microwave heating reactor 2 hypomere drops to lower than 100 DEG C, and namely isolated air-packing can be used as product, and the reaction end gas that gas base microwave heating reactor produces rises and discharges from reaction end gas relief outlet 12.
Claims (4)
1. a gas base method microwave heating continuous industry produces reduced iron powder device, it is characterized in that, this device comprises gas base microwave heating reactor (2), offer hot iron breeze (1) opening for feed in the side, top of gas base microwave heating reactor (2), opposite side offers reaction end gas relief outlet (12); On the outer side wall of gas base microwave heating reactor (2), staggered being provided with reacts microwave source (8); Gas base microwave heating reactor (2) bottom is set to funnelform cold cut section; In the inside of gas base microwave heating reactor (2), there is the inner chamber division plate (4) being no less than one-level staggered linking up and down, inner chamber division plate (4) is connected by domatic on inner chamber division plate (5) and inner chamber division plate Caused by Sloping Surfaces (6) two face of slope and forms, and two horizontal edges of inner chamber division plate (4) and top margin setting-in enter in the preformed groove on lagging material that gas base microwave heating reactor internal chamber wall lays; On the inner chamber division plate of first step inner chamber division plate (4), domatic (5) are located at the below of hot iron breeze (1) opening for feed of gas base microwave heating reactor (2), the inner chamber division plate Caused by Sloping Surfaces lower end of first step inner chamber division plate and the inner chamber division plate of second stage inner chamber division plate are provided with powdered iron ore blanking port (7) between domatic upper end, circulate successively, between the lower end of the inner chamber division plate Caused by Sloping Surfaces of N level inner chamber division plate and the sidewall on cold cut section top, be equipped with powdered iron ore blanking port (7); The sidewall of gas base microwave heating reactor (2) corresponding to every one-level inner chamber division plate (4) upper surface offers reductive agent and passes into mouth (9); Wherein, domatic on inner chamber division plate (5) gradient close to and be not less than powdered iron ore self-flowing angle, inner chamber division plate Caused by Sloping Surfaces (6) gradient close to and be not more than powdered iron ore self-flowing angle; Pass on mouth (9) at the reductive agent of every one-level and be all connected with heating gas pipeline (10), the heating gas provided by heated by gas device sends into inner chamber division plate (4) tops at different levels in gas base microwave heating reactor (2) respectively.
2. a kind of gas base method microwave heating continuous industry according to claim 1 produces reduced iron powder device, it is characterized in that: all to stagger the opening of reaction microwave source of subtend at interlock reaction microwave source (8) that opening arranges of gas base microwave heating reactor (2) outer side wall, microwave power adopts adjustable;
The outer side wall of gas base microwave heating reactor (2) stagger reaction microwave source (8) opening position separately staggered opening pass into mouth (9) as reductive agent.
3. a kind of gas base method microwave heating continuous industry according to claim 1 produces reduced iron powder device, it is characterized in that, at the joining place of upper and lower two-stage inner chamber division plate (4), inner chamber division plate Caused by Sloping Surfaces (6) tail end and gas base microwave heating reactor (2) internal chamber wall lagging material are provided with a long strip shape opening as hot iron breeze blanking port.
4. a kind of gas base method microwave heating continuous industry according to claim 1 produces the using method of reduced iron powder device, and it is characterized in that, step of getting is:
The hot iron breeze being heated to temperature > 800 DEG C enters gas base microwave heating reactor by the hot iron breeze opening for feed of gas base microwave heating reactor top, the hot iron breeze entering gas base microwave heating reactor falls on the inner chamber division plate of gas base microwave heating reactor, because the gradient domatic on inner chamber division plate is not less than hot iron breeze self-flowing angle, under gravity, hot iron breeze goes up a slope along inner chamber division plate and to face down movement, the inner chamber division plate Caused by Sloping Surfaces gradient close to and be not more than hot iron breeze self-flowing angle, the hot iron breeze resting on inner chamber division plate Caused by Sloping Surfaces is in from flowing criticality at any time when the hot iron breeze pressure being subject to domatic movement on inner chamber division plate just moves down, just stop or slowing down to gas base microwave heating reactor feeding hot iron breeze when needs extend the reduction reaction time, fall to next block inner chamber division plate through overheated powdered iron ore blanking port after hot iron breeze moves through domatic on inner chamber division plate, inner chamber division plate Caused by Sloping Surfaces and continue to move down, similar hot iron breeze moves through whole inner chamber division plate, the water-gas being heated to temperature > 600 DEG C passes into mouth by reductive agent and enters gas base microwave heating reactor, the reaction microwave source that gas base microwave heating reactor outer wall arranges is burst into micro-wave energy to gas base microwave heating reactor, Microwave Heating hot iron breeze also reduces reduction reaction reaction activity, water-gas and hot iron breeze generation reduction reaction, reactive chemistry equation is:
Fe
2O
3+3H
2＝2Fe+3H
2O
Fe
2O
3+3CO＝2Fe+3CO
2
Hot iron breeze is turned into thermal reduction iron powder through reduction reaction, and because reduction reaction completes at relatively low temperature, thermal reduction iron powder keeps powder to possess mobility mutually and continue to move down entering gas base microwave heating reactor hypomere and cool; The reaction end gas that gas base microwave heating reactor produces rises and discharges from reaction end gas relief outlet.
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|---|---|---|---|
| CN201510072960.3A CN104561425B (en) | 2015-02-12 | 2015-02-12 | A kind of gas base method microwave heating continuous industry produces reduced iron powder device and using method thereof |
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| CN201510072960.3A CN104561425B (en) | 2015-02-12 | 2015-02-12 | A kind of gas base method microwave heating continuous industry produces reduced iron powder device and using method thereof |
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| US4331470A (en) * | 1980-09-15 | 1982-05-25 | Midrex Corporation | Method for the direct reduction of iron in a shaft furnace using gas from coal |
| CN102135376A (en) * | 2010-01-26 | 2011-07-27 | 蒋明学 | Stepped furnace |
| CN102978320A (en) * | 2012-11-23 | 2013-03-20 | 武钢集团昆明钢铁股份有限公司 | Method for preparing direct-reduction iron by reducing carbon-containing iron ore powder in microwave heating manner |
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